{"instruction": "You are an expert in named entity recognition. Please extract entities that match the schema definition from the input. Return an empty list if the entity type does not exist. Please respond in the format of a JSON string.", "schema": ["concept or principle", "engineering feature", "material", "enabling technology", "biomedical", "manufacturing process"], "input": "4 Tools and methods for designing lightweight parts Lightweight design always has been a hot topic in structural engineering ."}
{"concept or principle": ["lightweight", "Lightweight", "structural engineering"], "engineering feature": ["design"], "material": [], "enabling technology": [], "biomedical": [], "manufacturing process": []}